A team from the Pennsylvania Department of Environmental Protection has responded and is working in the creek. They placed booms in the creek to soak up the oil and were performing tests for high chlorides and radioactivity. They said they would also perform an oil analysis.

"We've contained all the drains. We've notified the DEP. They're here. It did get in the creek -- roughly a 1-mile stretch of creek," Gump said.

Fracking water and diesel fuel both spilled onto the road, but at this point only the fuel has been confirmed to have gone into the creek.

"The frack truck, when he hit it, he ruptured a valve in the back. We had diesel and frack water both running down the road," Gump said.

The fracking water tankers, driven by workers for Highland Environmental LLC, were stopped at a red light at Henderson and Oak Grove roads when the third tanker hit them from behind, according to state police in Washington, Pa.

After being hit, one of the trucks rolled and landed on its left side in the parking lot of Lowry's Western Shop, police said.

JACKIE SHAFFER WITH THE SCHAFER WITH MORE. Reporter: WHAT CAUSED THEM TO CRASH INTO EACH OTHER REMAINS UNCLEAR AT THIS HOUR. THE DRIVER WHO CAUSED IT ALL HAD TO BE AIRLIFTED FOR A HEAD INJURY, AND POLICE SAY THEY NEED TO SPEAK WITH HIM. SKY 4 GIVING YOU THE BEST SHOT. YOU CAN SEE THE DESTRUCTION ON HENDERSON AVENUE AFTER A TRACTOR TRAILER DRIVER HAULING DIESEL FUEL SLAMMED INTO TANKER CARRYING FRACKING WATER AROUND 3:00 A.M. STATE POLICE SAY THE TWO SMALLER TANKERS WERE STOPPED AT THE LIGHT WHEN THIS TRUE CRASHED INTO THEM FROM BEHIND. THAT DRIVER WHO HASN'T BEEN IDENTITIED HAD TO BE FLOUNCE TO UPMC FOR A HEAD INJURY. A HIGHLAND ENVIRONMENT DRIVER WAS TRANSPORT FOLD AN EVALUATION AS WET. INVESTIGATORS SAY AFTER IMPACT, THE TRUCKS STARTED LEAKING CAUSING A HAZMAT SITUATION. IT RUPTURED A VALVE IN THE BACK. WE HAD DIESEL AND FRACK WATER BOTH RUNNING DOWN THE ROAD. Reporter: IT MADE ITS WAY INTO THE NEARBY CREEK. WE HAVE PRETTY MUCH CONTAINED THE DRAINS. IT DID GET IN THE CREEK. IT'S ROUGHLY PROBABLY A ONE MILE STRETCH OF CREEK. Reporter: WORKERS TELL ME AN ESTIMATED 400 GLOSS OF FRACKING WATER POURED ONTO THE ROADWAY, BUT THEY CAN'T FIRM WHETHER IT MADE THEY'RE TESTING FOR RADIOACTIVITY AND PERFORMING AN OIL ANALYSIS. OFFICIALS SAY THERE'S NO THREAT TO THE DRINKING WATER, BUT THERE IS SOIL AND STREAM CONTAMINATION. CREW VERSUS PLACES THE BOOMS TO TRY TO SO THAT OF A LOT OF THAT